Pro Audio Design Forum

That's beautiful work!
Where did you get those pots?

FWIW I noticed that Parts Express are stocking the Alps RK271(?) series: http://www.parts-express.com/alps-10kax ... t--023-204

A quick search turns up a tube filled with liquid. Or a tube emptying liquid... http://www.digikey.com/-/media/Images/Product%20Highlights/A/Advanced%20Thermal%20Solutions%20Inc/Round%20and%20Flat%20Copper%20Heat%20Pipes/ATSCopperHeatPipePH.jpg?la=en&ts=cdc9ab7d-f9f7-4894-9fcd-591083644f62 Thei...

Thanks! And it works too.... This is the servo output measuring the long term (3:20) DC offset drift. The first oscillogram is without the nut with the two ZTX851 being held together by only heatshrink. https://proaudiodesignforum.com/images/jpg/ZTX851_Drift_Heatshrink_Bonding.jpg ZTX851 Drift Heats...

Introducing the ZTX-851 differential pair in the "TO-1/4-20" package. https://proaudiodesignforum.com/images/jpg/ZTX851_TO1-4-20.jpg This works far better than the heatshrinked pair of ZTX851. I had to taper ream a 1/4-20 nut and then dabbed 5 minute epoxy onto the top. The epoxy filled th...

I found some 9/32" brass thin wall tubing in my stash that is perfect. Aluminum would be better: http://www.proaudiodesignforum.com/forum/php/viewtopic.php?f=12&t=796 I may visit Home Depot today and see if they have any aluminum tubing or short spacers with a 9/32" internal ID. The ZT...

Thermal Conductivity of Various Materials From Georgia State University: http://hyperphysics.phy-astr.gsu.edu/hb ... thrcn.html

These would now appear to be the devices of choice for very LoZ LN applications +1. Very much so. I need to try the ZTX951 PNP and directly compare it to the 2SB737 samples I have. I'll try regular epoxy and let you know. Also looked at Artic Silver: http://www.amazon.com/Arctic-Silver-Premium-Adhe...

I've used a small piece of Cu cut from pipes to clip the transistors together, gunking with heatsink compound and finishing of with a bit of heat shrink for quick & dirty applications. I've considered that and would like to epoxy them to make "custom" ( :lol: ) dual matched low noise ...

I was thinking of using SilPad in the sandwich.

The embeded image was a gif so I captured it and made it a jpg.


Feranti E-line thermal coupling from the Practical Electronics Gemini